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King Fahd University of Petroleum and Minerals Civil Engineering Department. CE599-Seminar Traffic Calming Techniques By: Maen A. Abu Olba. Presentation Outline. Definition. Main objectives. Main types. Design principles Practical example. Conclusions and Recommendations.

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King fahd university of petroleum and minerals civil engineering department

King Fahd University of Petroleum and MineralsCivil Engineering Department

CE599-Seminar

Traffic Calming Techniques

By: Maen A. Abu Olba


Presentation outline
Presentation Outline

  • Definition.

  • Main objectives.

  • Main types.

  • Design principles

  • Practical example.

  • Conclusions and Recommendations


What is traffic calming
What is Traffic Calming?

  • Traffic calming is the combination of mainly physical measures that reduce the negative effects of motor vehicle use, alter driver behavior and improve conditions for non-motorized street users


Objectives of traffic calming
Objectives of Traffic Calming

  • Achieving slow speeds and low volumes of motor vehicles.

  • Reducing collision frequency and severity.

  • Increasing the safety and the perception of safety for non-motorized users of the street(s).

  • Reducing the need for police enforcement.

  • Reducing air pollution and noise associated with increased traffic speed and volume.


Traffic calming techniques measures
Traffic Calming Techniques (Measures)

  • Volume control measures:

    are primarily used to address cut-through traffic problems by blockingcertain movements, thereby diverting traffic to streets better able to handle it.

  • Speed control measures:

    are primarily used to reduce the speed. Two types: vertical deflection and horizontal deflection.


Volume control measures
Volume control measures

  • Full Closures:



Speed control measures
Speed Control Measures

Vertical Deflection

  • Speed Humps:


b

  • Speed tables:


Horizontal deflection
Horizontal Deflection

  • Traffic Circles



Design principles horizontal curvature vs vehicle speed
Design PrinciplesHorizontal Curvature vs. Vehicle Speed

  • Relation between horizontal curvature to operating speed is represented by the following formula :

    R = V2 / 15(e+f)

  • For traffic calming purposes, Rrepresents the maximumhorizontal radius required to cause driver discomfort and reduce his speed.


Vertical curvature vs vehicle speed
Vertical Curvature vs. Vehicle Speed

  • Crossing speed is a function of the cross-sectional area. The greater the ratio of cross-sectional area to length, the lower the design speed.


Practical examples u s a
Practical ExamplesU.S.A

  • In North Ida Avenue project in Portland, (OR.), the first phase of the project involved 14-foot speed humps at three locations.

  • These installations were followed by the narrowing of travel lanes to make room for bicycle lanes.



Conclusions and recommendations
Conclusions and recommendations Ida Avenue. (Portland, OR.)

  • The construction cost of different traffic calming measures varies based on the material used in the construction and the use of landscaping.

  • The traffic calming measures must be designed to accommodate emergency vehicles.

  • Avoid placing traffic calming measures near hospitals and fire stations.


  • Traffic calming measures reduce speed, collision severity and crime.

  • Traffic calming should be well marked and delineated

  • Adequate traffic singes must be installed in the area of traffic calming measures.

  • They are generally more self-enforcing thaneducation and traditional enforcement efforts


Thank you
Thank You and crime.


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